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Roland AC-60 Manual

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Names of Things and What They Do
Setting the Feedback Point Automatically
You can have the frequency at which the feedback is
suppressed be determined automatically.
* Use in conditions where feedback occurs.
1.
Turn the FREQUENCY knob to the “AUTO” position.
fig.033
The ANTI-FEEDBACK indicator flashes slowly, and
automatic detection goes into standby.
2.
Press the START button.
Automatic detection of the feedback point starts. The
indicator flashes rapidly when detection is in progresses,
and when the feedback point is found, the indicator
lights steadily. If no feedback point is detected, the
indicator flashes slowly, and the automatic detection
function returns to standby.
3.
Press the START button once more to conduct the
automatic detection again.
Setting the Feedback Point Manually
Turn the knob to select the frequency at which the feedback
is to be suppressed.
Turn the knob, moving through the range of L through H
(the ANTI-FEEDBACK indicator lights up) to set the
frequency at which the feedback is to be suppressed.
fig.34
The frequency to which the anti-feedback function is applied
increases as the knob is turned to the right.
You can use a foot switch (the optional BOSS FS-5U) to run
automatic detection of the feedback frequency or to turn the
anti-feedback function on and off.
You can use anti-feedback even when feedback is not a
problem. For example, you can use it to remove undesirable
resonance in the low to midrange, as well as correct other
problems with the sound quality.
15. MUTE button
This switches the Mute function on and off.
When you press the button, the MUTE indicator flashes,
muting is turned on, and the speaker output and sounds
from SUB WOOFER OUT and LINE OUT are muted.
With the mute function activated, you do not need to turn
down the VOLUME knob or MASTER knob to mute the
noise when plugging into, or unplugging from your guitar.
* Sounds from the DI OUT/TUNER OUT and PHONES jacks
are not muted.
By connecting a tuner (optional) to DI OUT/TUNER OUT
and then pressing the MUTE button, you can tune your
instrument without the sound being output from the
speakers.
You can use a foot switch (the optional BOSS FS-5U) to
switch muting on and off. (p. 12)
16. MASTER knob
This adjusts the volume from the speakers, PHONES, and
SUB WOOFER OUT.
17. PHONES jack
Headphones are connected here. No sounds are output from
the speakers or from SUB WOOFER OUT when headphones
are connected.
18. POWER switch
This turns the AC-60’s power on and off.
The POWER indicator lights up when the power is on.
* This unit is equipped with a protection circuit. A brief interval
(a few seconds) after power up is required before the unit will
operate normally.
945
* If you need to turn off the power completely, first turn off the
POWER switch, then unplug the power cord from the power
outlet. Refer to
Power Supply
(p. 5).
AC-60_e.book 10 ページ ２００６年９月８日　金曜日　午後２時２１分
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